Improve 2025 day 1 in rust

2025/inputs/01.txt

@@ -0,0 +1,10 @@
+L68
+L30
+R48
+L5
+R60
+L55
+L1
+L99
+R14
+L82

2025/rust/.envrc

@@ -0,0 +1 @@
+use flake .#rust

2025/rust/day-01/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "day-01"
+version = "0.1.0"

2025/rust/day-01/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "day-01"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

2025/rust/day-01/src/main.rs

@@ -0,0 +1,62 @@
+use std::fs::{self};
+
+const STARTING_POSITION: i32 = 50;
+const DIAL_RANGE: i32 = 100;
+
+fn main() {
+    let rotations = read_rotations();
+
+    println!("Password1: {}", count_zero_positions(&rotations));
+    println!("Password2: {}", count_zero_clicks(&rotations));
+}
+
+fn read_rotations() -> Vec<i32> {
+    fs::read_to_string("../../inputs/01.txt")
+        .unwrap()
+        .lines()
+        .map(|line| {
+            let distance = line[1..].parse::<i32>().unwrap();
+            if line.starts_with('L') {
+                -distance
+            } else {
+                distance
+            }
+        })
+        .collect()
+}
+
+fn count_zero_positions(rotations: &[i32]) -> i32 {
+    let mut counter = 0;
+    let mut position = STARTING_POSITION;
+
+    for rotation in rotations {
+        position = (position + rotation).rem_euclid(DIAL_RANGE);
+
+        if position == 0 {
+            counter += 1;
+        }
+    }
+
+    counter
+}
+
+fn count_zero_clicks(rotations: &[i32]) -> i32 {
+    let mut counter = 0;
+    let mut position = STARTING_POSITION;
+
+    for rotation in rotations {
+        position += rotation;
+
+        counter += (position / DIAL_RANGE).abs();
+        if position < 0 && position != *rotation {
+            counter += 1;
+        }
+        if position == 0 {
+            counter += 1;
+        }
+
+        position = position.rem_euclid(DIAL_RANGE);
+    }
+
+    counter
+}

flake.lock

@@ -2,16 +2,16 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1759439645,
+        "lastModified": 1764522689,
-        "narHash": "sha256-oiAyQaRilPk525Z5aTtTNWNzSrcdJ7IXM0/PL3CGlbI=",
+        "narHash": "sha256-SqUuBFjhl/kpDiVaKLQBoD8TLD+/cTUzzgVFoaHrkqY=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "879bd460b3d3e8571354ce172128fbcbac1ed633",
+        "rev": "8bb5646e0bed5dbd3ab08c7a7cc15b75ab4e1d0f",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-25.05",
+        "ref": "nixos-25.11",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -29,11 +29,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1759544920,
+        "lastModified": 1764557621,
-        "narHash": "sha256-yQwP0JOHi3Icq09GG5ufGuGrq2zIijglVFj3kkF2MHA=",
+        "narHash": "sha256-kX5PoY8hQZ80+amMQgOO9t8Tc1JZ70gYRnzaVD4AA+o=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "bd3a63bbff2c4cb3cd48e9d49f54c2ccad457f70",
+        "rev": "93316876c2229460a5d6f5f052766cc4cef538ce",
         "type": "github"
       },
       "original": {

flake.nix

@@ -1,6 +1,6 @@
 {
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
 
     rust-overlay = {
       url = "github:oxalica/rust-overlay";
@@ -20,7 +20,6 @@
           packages = with pkgs; [
             gdb
             clang-tools
-            qt6.full
           ];
         };